The transmission grid enables interconnections with neighbouring countries and connects generation and production sites across France. Its main arteries (the 400 kV network and a portion of the 225 kV network) are used to carry electricity from major generation sites (nuclear power plants and large hydropower dams), and the main distribution lines (below 225 kV) distribute energy across a supra-regional and regional network for delivery to local territories.

Consumption and generation trends differ from one region to the next. The electricity transmission network enables exchanges between them: generation units in the Centre-Val de Loire or Grand Est regions can help meet power demand beyond the local level.

Electricity exchanges between French regions in 2020